Question

It might not be visually apparent, but solids such as metal change their volume with temperature. This is known as
Question 11 options:


A)
density.


B)
floating.


C)
nuclear fusion.


D)
thermal expansion/contraction.
Question 12 (5 points)

The molecules in a material need to move with more energy for the material to change from a
Question 12 options:


A)
liquid to a solid.


B)
liquid to a gas.


C)
gas to a solid.


D)
gas to a liquid.
Question 13 (5 points)

What happens when heat is removed from a substance at a critical temperature?
Question 13 options:


A)
The temperature of the substance will change rapidly as heat is lost until the state changes completely.


B)
The substance changes temperature at the same rate before, during, and after the change of state.


C)
The heat is cycled back into the substance, causing the temperature to increase.


D)
The substance releases heat but won't change temperature until the state changes completely.
Question 14 (5 points)

If three objects all float on top of water, what must be true about the objects?
Question 14 options:


A)
They all have densities less than the density of water.


B)
They must have the same volume, even if their masses are different.


C)
They must have the same mass, even if their volumes are different.


D)
They all have densities greater than the density of water.
Question 15 (5 points)

A chair has four narrow legs holding it up. The same model of chair is next to it, but the legs have been removed so that the entire base of the chair rests on the floor. Which is true, assuming the chairs have the same mass?
Question 15 options:


A)
The chair without the legs puts more pressure on the floor.


B)
The chairs put equal amounts of pressure on the floor and have the same weight.


C)
The chairs put equal amounts of pressure on the floor but have different weights.


D)
The chair with legs puts more pressure on the floor.
Question 16 (5 points)

What happens whenever the pressure in a confined liquid increases or decreases at any point?
Question 16 options:


A)
The pressure causes the liquid molecules to slow their movement.


B)
The change in pressure decreases with distance from the pressure point.


C)
The pressure decreases in one area but increases in another area.


D)
The change in pressure is transmitted equally throughout the entire liquid.
Question 17 (5 points)

What feature does a liquid have if it's considered volatile?
Question 17 options:


A)
It doesn't freeze unless it gets below absolute zero.


B)
It evaporates rapidly at a low temperature.


C)
It contains a lot of oxygen to support combustion.


D)
It releases energy when it contacts water.
Question 18 (5 points)

What happens when a refrigerant evaporates?
Question 18 options:


A)
The pressure on it increases, and it radiates heat to its surroundings.


B)
The surface tension on it increases, and it sticks to its surroundings.


C)
It expands rapidly and absorbs heat from its surroundings.


D)
It compresses itself and doesn't contact its surroundings.
Question 19 (5 points)

A unique property of water because of its chemical structure is that it's _______ dense when it's a solid than when it's a liquid.
Question 19 options:


A)
less


B)
inversely


C)
equally


D)
more
Question 20 (5 points)

If a gas has a gauge pressure of 156 kPa, its absolute pressure is approximately
Question 20 options:


A)
100 kPa


B)
56 kPa.


C)
300 kPa.


D)
256 kPa.

Answer 1

11: D
12: B
13: D
14: A
15: D
16: D
17: B
18: C
19: A
20: D